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Airspeed awareness in the circuit & cross controlling

 
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rlborger(at)mac.com
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PostPosted: Fri Jul 28, 2006 2:22 pm    Post subject: Airspeed awareness in the circuit & cross controlling Reply with quote

Fellow Europaphiles,
I guess I have to add my 2 bits to these topics (one topic really).  

Skid or slip, both are cross controlled conditions.  If the ball isn't in the center, you are cross controlled.  The slip is less dangerous, but you can stall out of it too, you just stall the "up" wing instead of the "down" wing.

The turn from base to final is the source of one heck of a lot of accidents.  Usually the result of a delayed turn.  The delay might be due to a misjudgment of the winds, a bit too long on the scan up final to check for someone out there, unexpected radio call, whatever.  You find yourself overshooting the turn and you want to get back lined up on final.  You steepen the bank but it isn't enough and you are low and slow enough that you don't want to increase the bank angle any more.   Darn, you are so close to that center line, maybe just a quick poke of that "down" rudder will chase the nose around and get you close to lined up.  You poke and, Bingo, the "down" wing stalls, you flip over and you are in a spin at an altitude where you'll never recover.  It's very insidious.  It can happen to anyone regardless of experience level.  I saw it happen to a highly experienced glider tow pilot (many many hours) in a Super Cub when he tried to hurry the turn to final so he get down to pick up that next tow ASAP.  Luckily, he walked (limped?) away from it bruised but otherwise unhurt.  

My private instructor warned me incessantly about it.  Finally demonstrating it to me at altitude.  It impressed me!  Man, one minute you are in a nice turn, then you are doing an upside down spin entry.  I think we lost 1000 - 1500 feet (300 - 500 meters for you folks on the east side of the pond) before we recovered.  The other interesting thing was no stall warning till it was way too late and we were going over.  That was in 1968 and I'm STILL impressed. (Thanks to Carol "Speed" Conaway for that lesson!)

All I can say is resist that temptation to use that "down" rudder to hurry the nose around when you are already uncomfortable with the bank angle and turn rate.  That "down" wing is on the inside of the turn, moving much slower than the "up" wing on the outside.  Even though your airspeed may look OK, it probably wouldn't take much of a kick on the rudder to make the low wing stop flying.

I'll get off my soapbox and let the rest of you fire away.
Good building and great (safe, please, I don't want to lose any more friends) flying,

Bob Borger
Europa Kit #A221 N914XL, XS Mono, Intercooled 914, Airmaster C/S
http://www.europaowners.org/N914XL
(85%) tail kit done, wings closed, cockpit module installed, pitch system in, landing gear frame in, rudder system in, outrigger mod in, Fuselage Top on, lift/drag/flap pins in, wing incidence set, tie bar in, flap drive in, Mod 70 done.  Baggage bay in.  Working in - 24 Instrument Panel, 25 Electrical, 28 Flaps, 29 Main Gear, 30 Fuel System, 32 Tail, 34 Door Latches & 35 Doors, 37 Finishing.  Airmaster arrived 29 Sep 05.  Seat arrived from Oregon Aero.  Preparing ROTAX 914 for installation.
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